Sash-fastener



No. 624,783. I Patented May ,9, I899. E. FULLER.

SASH FASTENER.

(Appl canon filgd Aug. 15, 1898.)

(No Model.)

E L; J

WITNESSES INVENTOR MMM [0962] ii? ZZZ/"1' W U NITED A STATES PATENT OFFICE.

EDGAR FULLER, OF FORT ASSINNIBOINE, MONTANA.

' SASH-FASTEN ER.

SPECIFICATION forming part of Letters Patent No. 624,783, dated May 9, 1899. Application filed August 15,1898. Serial No. 688,596. (No model.)

T0 at whom it may concern.-

Be it known that I, EDGAR FULLER, a citi zen of the United States, residing at Fort Assinniboin e, in the county of Ohotea'u and State of Montana, have invented certain new and useful Improvements in Sash-Fasteners and I do hereby declare the following to be a full, clear, and exact description of the invention,

such as will enable others skilled in the art to which it appertains to make and use the same. This invention relates to improvements in saslrfasteners of that class embodying a gear W a fragmentary elevation of a window frame and sash with parts broken away to show the invention applied thereto. Fig. 2 is a vertical longitudinal section through the gear-case on an enlarged scale. Fig. 3 is a vertical transverse section of the same. Fig. 4 is a detail view of the spring-clamps and coactin g block on the pinion. Fig. 5 is a similar view of the pinion. Fig. 6 is a front view of the slotted rack-plate.

Referring now more particularly to the drawings, wherein like letters of reference designate corresponding parts throughout the several views, A represents a window-frame, and B a window-sash mounted to slide vertically therein in the usualmanner.

To the inner face of the side of the casing is secured a plate 0, slotted at regular intervals to form a series of rack-teeth cl, said plate being preferably seated in a recess, so that the outer surface thereof will be flush with the casing. The contiguous stile of the windowsash is mortised to receive a casing E, the

front wall of which is provided with ears for passage of screws to secure it to the stile and with a slot F. Arranged in the case is aspur pinion G, which projects through the slot and meshes with the said rack-plate 0, whereby the pinion is caused to revolve as the sash is raised and lowered. This pinion is mounted on a short shaft or spindle h, journaled in the case and provided with a fixed rectangular block or locking-head *6, located on one side of the pinion.

Suitably secured at the top and bottom in the case on the same side of the pinion as the locking-head is a pair of spring-metal plates or strips J, each provided centrally with aV shaped outwardly bent or deflected portion is. The plates are arranged para1lel,with their broad sides facing each other, and the said deflected portions thereof are reversely projected and oppositely disposed, thus forming a rectangular keeper-socket for the reception of the locking-head t, which is adapted to be embraced thereby at each quarter-revolution of the pinion to hold the latter firmly against rotation, so that the sash will. be supported. By the peculiar construction and arrangement of parts just described it will be'seen that when the corners of the locking-head bear against the sides of the V-shaped de flected portions of the spring-plates, as shown in Fig. 4, the latter will spring apart and allow the pinion to turn; but when the broad sides of the head come in contact therewith, as shown in Fig. 2, the plates will close together and embrace the locking-head firmly, so as to hold the same and the pinionagainst accidental rotation. As the teeth of the pinion are in meshwith the rack, the window-sash will then be supported. The spring-plates are made stifi. enough to resist the turning of the locking-head under thetendency of the sash to drop by gravity, and yet suificiently resilient to allow the spring-keeper to expand and contract and said block to rotate therein freely when the sash is forcibly elevated or depressed. .Thus the sash may be conveniently raised and lowered without hindrance and automatically locked at any desired elevation.

It will of course be understood that the arrangement of parts shown and described for purposes of illustration herein may be re-' versed-that is, the rack-plate placed on the stile of the sash and the casing, with the pinion and its coacting locking mechanism, on

. vice.

Having thus described the invention, What in presence of two witnesses.

is claimed as new is- In a sash-fastener,the combination of a rack, a casing, a pinion adapted to mesh with the rack and mounted on a shaft or spindle journaled in the casing, an angular locking-head or block on the spindle at one side of the pinion, and a pair of parallel spring-plates secured at their upper and lower ends in the casing, said plates having their broad sides facing each other and bearing on opposite sides of the locking-head and bent to form an angular keeper-socket normally'embracing the same, substantially as described.

In testimony whereof I afiix my signature EDGAR FULLER. Witnesses:

PETER DES RosIER, GEORGE HERRON. 

